

export function GetOrbitControls(object, domElement, THREE){
  const {
    EventDispatcher,
    MOUSE,
    Quaternion,
    Spherical,
    TOUCH,
    Vector2,
    Vector3
  } = THREE;
  function OrbitControls(object, domElement) {
    if (domElement === undefined) console.warn('THREE.OrbitControls: The second parameter "domElement" is now mandatory.');
    if (domElement === document) console.error('THREE.OrbitControls: "document" should not be used as the target "domElement". Please use "renderer.domElement" instead.');
  
    this.object = object;
    this.domElement = domElement;
  
    // Set to false to disable this control
    this.enabled = true;
  
    // "target" sets the location of focus, where the object orbits around
    this.target = new Vector3();
  
    // How far you can dolly in and out ( PerspectiveCamera only )
    this.minDistance = 0;
    this.maxDistance = Infinity;
  
    // How far you can zoom in and out ( OrthographicCamera only )
    this.minZoom = 0;
    this.maxZoom = Infinity;
  
    // How far you can orbit vertically, upper and lower limits.
    // Range is 0 to Math.PI radians.
    this.minPolarAngle = 0; // radians
    this.maxPolarAngle = Math.PI; // radians
  
    // How far you can orbit horizontally, upper and lower limits.
    // If set, must be a sub-interval of the interval [ - Math.PI, Math.PI ].
    this.minAzimuthAngle = - Infinity; // radians
    this.maxAzimuthAngle = Infinity; // radians
  
    // Set to true to enable damping (inertia)
    // If damping is enabled, you must call controls.update() in your animation loop
    this.enableDamping = false;
    this.dampingFactor = 0.05;
  
    // This option actually enables dollying in and out; left as "zoom" for backwards compatibility.
    // Set to false to disable zooming
    this.enableZoom = true;
    this.zoomSpeed = 1.0;
  
    // Set to false to disable rotating
    this.enableRotate = true;
    this.rotateSpeed = 1.0;
  
    // Set to false to disable panning
    this.enablePan = true;
    this.panSpeed = 1.0;
    this.screenSpacePanning = false; // if true, pan in screen-space
    this.keyPanSpeed = 7.0;	// pixels moved per arrow key push
  
    // Set to true to automatically rotate around the target
    // If auto-rotate is enabled, you must call controls.update() in your animation loop
    this.autoRotate = false;
    this.autoRotateSpeed = 2.0; // 30 seconds per round when fps is 60
  
    // Set to false to disable use of the keys
    this.enableKeys = true;
  
    // The four arrow keys
    this.keys = { LEFT: 37, UP: 38, RIGHT: 39, BOTTOM: 40 };
  
    // Mouse buttons
    this.mouseButtons = { LEFT: MOUSE.ROTATE, MIDDLE: MOUSE.DOLLY, RIGHT: MOUSE.PAN };

    // Touch fingers
    this.touches = { ONE: TOUCH.ROTATE, TWO: TOUCH.DOLLY_PAN };
  
    // for reset
    this.target0 = this.target.clone();
    this.position0 = this.object.position.clone();
    this.zoom0 = this.object.zoom;
  
    //
    // public methods
    //
  
    this.getPolarAngle = function () {
  
      return spherical.phi;
  
    };
  
    this.getAzimuthalAngle = function () {
  
      return spherical.theta;
  
    };
  
    this.saveState = function () {
  
      scope.target0.copy(scope.target);
      scope.position0.copy(scope.object.position);
      scope.zoom0 = scope.object.zoom;
  
    };
  
    this.reset = function () {
  
      scope.target.copy(scope.target0);
      scope.object.position.copy(scope.position0);
      scope.object.zoom = scope.zoom0;
  
      scope.object.updateProjectionMatrix();
      scope.dispatchEvent(changeEvent);
  
      scope.update();
  
      state = STATE.NONE;
  
    };
  
    // this method is exposed, but perhaps it would be better if we can make it private...
    this.update = function () {
  
      var offset = new Vector3();
  
      // so camera.up is the orbit axis
      var quat = new Quaternion().setFromUnitVectors(object.up, new Vector3(0, 1, 0));
      var quatInverse = quat.clone().inverse();
  
      var lastPosition = new Vector3();
      var lastQuaternion = new Quaternion();
  
      return function update() {
        
        var position = scope.object.position;
  
        offset.copy(position).sub(scope.target);
  
        // rotate offset to "y-axis-is-up" space
        offset.applyQuaternion(quat);
  
        // angle from z-axis around y-axis
        spherical.setFromVector3(offset);
  
        if (scope.autoRotate && state === STATE.NONE) {
  
          rotateLeft(getAutoRotationAngle());
  
        }
  
        if (scope.enableDamping) {
  
          spherical.theta += sphericalDelta.theta * scope.dampingFactor;
          spherical.phi += sphericalDelta.phi * scope.dampingFactor;
  
        } else {
  
          spherical.theta += sphericalDelta.theta;
          spherical.phi += sphericalDelta.phi;
  
        }
  
        // restrict theta to be between desired limits
        spherical.theta = Math.max(scope.minAzimuthAngle, Math.min(scope.maxAzimuthAngle, spherical.theta));
  
        // restrict phi to be between desired limits
        spherical.phi = Math.max(scope.minPolarAngle, Math.min(scope.maxPolarAngle, spherical.phi));
  
        spherical.makeSafe();
  
  
        spherical.radius *= scale;
  
        // restrict radius to be between desired limits
        spherical.radius = Math.max(scope.minDistance, Math.min(scope.maxDistance, spherical.radius));
  
        // move target to panned location
        
        if (scope.enableDamping === true) {
  
          scope.target.addScaledVector(panOffset, scope.dampingFactor);
  
        } else {
  
          scope.target.add(panOffset);
  
        }
  
        offset.setFromSpherical(spherical);
  
        // rotate offset back to "camera-up-vector-is-up" space
        offset.applyQuaternion(quatInverse);
  
        position.copy(scope.target).add(offset);
  
        scope.object.lookAt(scope.target);
  
        if (scope.enableDamping === true) {
  
          sphericalDelta.theta *= (1 - scope.dampingFactor);
          sphericalDelta.phi *= (1 - scope.dampingFactor);
  
          panOffset.multiplyScalar(1 - scope.dampingFactor);
  
        } else {
  
          sphericalDelta.set(0, 0, 0);
  
          panOffset.set(0, 0, 0);
  
        }
  
        scale = 1;
  
        // update condition is:
        // min(camera displacement, camera rotation in radians)^2 > EPS
        // using small-angle approximation cos(x/2) = 1 - x^2 / 8
  
        if (zoomChanged ||
          lastPosition.distanceToSquared(scope.object.position) > EPS ||
          8 * (1 - lastQuaternion.dot(scope.object.quaternion)) > EPS) {
  
          scope.dispatchEvent(changeEvent);
  
          lastPosition.copy(scope.object.position);
          lastQuaternion.copy(scope.object.quaternion);
          zoomChanged = false;
  
          return true;
  
        }
  
        return false;
  
      };
  
    }();
  
    this.dispose = function () {
  
      // scope.domElement.removeEventListener('contextmenu', onContextMenu, false);
      // scope.domElement.removeEventListener('mousedown', onMouseDown, false);
      // scope.domElement.removeEventListener('wheel', onMouseWheel, false);
  
      // scope.domElement.removeEventListener('touchstart', onTouchStart, false);
      // scope.domElement.removeEventListener('touchend', onTouchEnd, false);
      // scope.domElement.removeEventListener('touchmove', onTouchMove, false);
  
      // document.removeEventListener('mousemove', onMouseMove, false);
      // document.removeEventListener('mouseup', onMouseUp, false);
  
      // scope.domElement.removeEventListener('keydown', onKeyDown, false);
  
      //scope.dispatchEvent( { type: 'dispose' } ); // should this be added here?
  
    };
  
    //
    // internals
    //
  
    var scope = this;
  
    var changeEvent = { type: 'change' };
    var startEvent = { type: 'start' };
    var endEvent = { type: 'end' };
  
    var STATE = {
      NONE: - 1,
      ROTATE: 0,
      DOLLY: 1,
      PAN: 2,
      TOUCH_ROTATE: 3,
      TOUCH_PAN: 4,
      TOUCH_DOLLY_PAN: 5,
      TOUCH_DOLLY_ROTATE: 6
    };
  
    var state = STATE.NONE;
  
    var EPS = 0.000001;
  
    // current position in spherical coordinates
    var spherical = new Spherical();
    var sphericalDelta = new Spherical();
  
    var scale = 1;
    var panOffset = new Vector3();
    var zoomChanged = false;
  
    var rotateStart = new Vector2();
    var rotateEnd = new Vector2();
    var rotateDelta = new Vector2();
  
    var panStart = new Vector2();
    var panEnd = new Vector2();
    var panDelta = new Vector2();
  
    var dollyStart = new Vector2();
    var dollyEnd = new Vector2();
    var dollyDelta = new Vector2();
  
    function getAutoRotationAngle() {
  
      return 2 * Math.PI / 60 / 60 * scope.autoRotateSpeed;
  
    }
  
    function getZoomScale() {

      return Math.pow(0.95, scope.zoomSpeed);
  
    }
  
    function rotateLeft(angle) {
  
      sphericalDelta.theta -= angle;
  
    }
  
    function rotateUp(angle) {
  
      sphericalDelta.phi -= angle;
  
    }
  
    var panLeft = function () {
  
      var v = new Vector3();
  
      return function panLeft(distance, objectMatrix) {
  
        v.setFromMatrixColumn(objectMatrix, 0); // get X column of objectMatrix
        v.multiplyScalar(- distance);
  
        panOffset.add(v);
  
      };
  
    }();
  
    var panUp = function () {
  
      var v = new Vector3();
  
      return function panUp(distance, objectMatrix) {
  
        if (scope.screenSpacePanning === true) {
  
          v.setFromMatrixColumn(objectMatrix, 1);
  
        } else {
  
          v.setFromMatrixColumn(objectMatrix, 0);
          v.crossVectors(scope.object.up, v);
  
        }
  
        v.multiplyScalar(distance);
  
        panOffset.add(v);
  
      };
  
    }();
  
    // deltaX and deltaY are in pixels; right and down are positive
    var pan = function () {
  
      var offset = new Vector3();
  
      return function pan(deltaX, deltaY) {
  
        var element = scope.domElement;
  
        if (scope.object.isPerspectiveCamera) {
  
          // perspective
          var position = scope.object.position;
          offset.copy(position).sub(scope.target);
          var targetDistance = offset.length();
  
          // half of the fov is center to top of screen
          targetDistance *= Math.tan((scope.object.fov / 2) * Math.PI / 180.0);
  
          // we use only height here so aspect ratio does not distort speed
          panLeft(2 * deltaX * targetDistance / element.height, scope.object.matrix);
          panUp(2 * deltaY * targetDistance / element.height, scope.object.matrix);
  
        } else if (scope.object.isOrthographicCamera) {

          // orthographic
          panLeft(deltaX * (scope.object.right - scope.object.left) / scope.object.zoom / element.width, scope.object.matrix);
          panUp(deltaY * (scope.object.top - scope.object.bottom) / scope.object.zoom / element.height, scope.object.matrix);
  
        } else {
  
          // camera neither orthographic nor perspective
          console.warn('WARNING: OrbitControls.js encountered an unknown camera type - pan disabled.');
          scope.enablePan = false;
  
        }
  
      };
  
    }();
  
    function dollyOut(dollyScale) {
  
      if (scope.object.isPerspectiveCamera) {
  
        scale /= dollyScale;
  
      } else if (scope.object.isOrthographicCamera) {
  
        scope.object.zoom = Math.max(scope.minZoom, Math.min(scope.maxZoom, scope.object.zoom * dollyScale));
        scope.object.updateProjectionMatrix();
        zoomChanged = true;
  
      } else {
  
        console.warn('WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.');
        scope.enableZoom = false;
  
      }
  
    }
  
    function dollyIn(dollyScale) {
  
      if (scope.object.isPerspectiveCamera) {
  
        scale *= dollyScale;
  
      } else if (scope.object.isOrthographicCamera) {
  
        scope.object.zoom = Math.max(scope.minZoom, Math.min(scope.maxZoom, scope.object.zoom / dollyScale));
        scope.object.updateProjectionMatrix();
        zoomChanged = true;
  
      } else {
  
        console.warn('WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.');
        scope.enableZoom = false;
  
      }
  
    }
  
    //
    // event callbacks - update the object state
    //
  
    function handleMouseDownRotate(event) {
  
      rotateStart.set(event.clientX, event.clientY);
  
    }
  
    function handleMouseDownDolly(event) {
  
      dollyStart.set(event.clientX, event.clientY);
  
    }
  
    function handleMouseDownPan(event) {
  
      panStart.set(event.clientX, event.clientY);
  
    }
  
    function handleMouseMoveRotate(event) {
  
      rotateEnd.set(event.clientX, event.clientY);
  
      rotateDelta.subVectors(rotateEnd, rotateStart).multiplyScalar(scope.rotateSpeed);
  
      var element = scope.domElement;
  
      rotateLeft(2 * Math.PI * rotateDelta.x / element.height); // yes, height
  
      rotateUp(2 * Math.PI * rotateDelta.y / element.height);
  
      rotateStart.copy(rotateEnd);
  
      scope.update();
  
    }
  
    function handleMouseMoveDolly(event) {
  
      dollyEnd.set(event.clientX, event.clientY);
  
      dollyDelta.subVectors(dollyEnd, dollyStart);
  
      if (dollyDelta.y > 0) {
  
        dollyOut(getZoomScale());
  
      } else if (dollyDelta.y < 0) {
  
        dollyIn(getZoomScale());
  
      }
  
      dollyStart.copy(dollyEnd);
  
      scope.update();
  
    }
  
    function handleMouseMovePan(event) {
  
      panEnd.set(event.clientX, event.clientY);
  
      panDelta.subVectors(panEnd, panStart).multiplyScalar(scope.panSpeed);
  
      pan(panDelta.x, panDelta.y);
  
      panStart.copy(panEnd);
  
      scope.update();
  
    }
  
    function handleMouseUp( /*event*/) {
  
      // no-op
  
    }
  
    function handleMouseWheel(event) {
  
      if (event.deltaY < 0) {
  
        dollyIn(getZoomScale());
  
      } else if (event.deltaY > 0) {
  
        dollyOut(getZoomScale());
  
      }
  
      scope.update();
  
    }
  
    function handleKeyDown(event) {
  
      var needsUpdate = false;
  
      switch (event.keyCode) {
  
        case scope.keys.UP:
          pan(0, scope.keyPanSpeed);
          needsUpdate = true;
          break;
  
        case scope.keys.BOTTOM:
          pan(0, - scope.keyPanSpeed);
          needsUpdate = true;
          break;
  
        case scope.keys.LEFT:
          pan(scope.keyPanSpeed, 0);
          needsUpdate = true;
          break;
  
        case scope.keys.RIGHT:
          pan(- scope.keyPanSpeed, 0);
          needsUpdate = true;
          break;
  
      }
  
      if (needsUpdate) {
  
        // prevent the browser from scrolling on cursor keys
        // event.preventDefault();
  
        scope.update();
  
      }
  
  
    }
  
    function handleTouchStartRotate(event) {
  
      if (event.touches.length == 1) {
  
        rotateStart.set(event.touches[0].pageX, event.touches[0].pageY);
  
      } else {
  
        var x = 0.5 * (event.touches[0].pageX + event.touches[1].pageX);
        var y = 0.5 * (event.touches[0].pageY + event.touches[1].pageY);
  
        rotateStart.set(x, y);
  
      }
  
    }
  
    function handleTouchStartPan(event) {
  
      if (event.touches.length == 1) {
  
        panStart.set(event.touches[0].pageX, event.touches[0].pageY);
  
      } else {
  
        var x = 0.5 * (event.touches[0].pageX + event.touches[1].pageX);
        var y = 0.5 * (event.touches[0].pageY + event.touches[1].pageY);
  
        panStart.set(x, y);
  
      }
  
    }
  
    function handleTouchStartDolly(event) {
  
      var dx = event.touches[0].pageX - event.touches[1].pageX;
      var dy = event.touches[0].pageY - event.touches[1].pageY;
  
      var distance = Math.sqrt(dx * dx + dy * dy);
  
      dollyStart.set(0, distance);
  
    }
  
    function handleTouchStartDollyPan(event) {

      if (scope.enableZoom) handleTouchStartDolly(event);
  
      if (scope.enablePan) handleTouchStartPan(event);
  
    }
  
    function handleTouchStartDollyRotate(event) {
  
      if (scope.enableZoom) handleTouchStartDolly(event);
  
      if (scope.enableRotate) handleTouchStartRotate(event);
  
    }
  
    function handleTouchMoveRotate(event) {
  
      if (event.touches.length == 1) {
  
        rotateEnd.set(event.touches[0].pageX, event.touches[0].pageY);
  
      } else {
  
        var x = 0.5 * (event.touches[0].pageX + event.touches[1].pageX);
        var y = 0.5 * (event.touches[0].pageY + event.touches[1].pageY);
  
        rotateEnd.set(x, y);
  
      }
  
      rotateDelta.subVectors(rotateEnd, rotateStart).multiplyScalar(scope.rotateSpeed);
  
      var element = scope.domElement;
  
      rotateLeft(2 * Math.PI * rotateDelta.x / element.height); // yes, height
  
      rotateUp(2 * Math.PI * rotateDelta.y / element.height);
  
      rotateStart.copy(rotateEnd);
  
    }
  
    function handleTouchMovePan(event) {
  
      if (event.touches.length == 1) {
  
        panEnd.set(event.touches[0].pageX, event.touches[0].pageY);
  
      } else {
  
        var x = 0.5 * (event.touches[0].pageX + event.touches[1].pageX);
        var y = 0.5 * (event.touches[0].pageY+ event.touches[1].pageY);
  
        panEnd.set(x, y);
  
      }
      
      panDelta.subVectors(panEnd, panStart).multiplyScalar(scope.panSpeed);
  
      pan(panDelta.x, panDelta.y);
  
      panStart.copy(panEnd);
  
    }
  
    function handleTouchMoveDolly(event) {
  
      var dx = event.touches[0].pageX - event.touches[1].pageX;
      var dy = event.touches[0].pageY - event.touches[1].pageY;
  
      var distance = Math.sqrt(dx * dx + dy * dy);
  
      dollyEnd.set(0, distance);

      dollyDelta.set(0, Math.pow(dollyEnd.y / dollyStart.y, scope.zoomSpeed));
  
      dollyOut(dollyDelta.y);
  
      dollyStart.copy(dollyEnd);
  
    }
  
    function handleTouchMoveDollyPan(event) {
  
      if (scope.enableZoom) handleTouchMoveDolly(event);
  
      if (scope.enablePan) handleTouchMovePan(event);
  
    }
  
    function handleTouchMoveDollyRotate(event) {
  
      if (scope.enableZoom) handleTouchMoveDolly(event);
  
      if (scope.enableRotate) handleTouchMoveRotate(event);
  
    }
  
    function handleTouchEnd( /*event*/) {
  
      // no-op
  
    }
  
    //
    // event handlers - FSM: listen for events and reset state
    //
  
    function onMouseDown(event) {
  
      if (scope.enabled === false) return;
  
      // Prevent the browser from scrolling.
      // event.preventDefault();
  
      // Manually set the focus since calling preventDefault above
      // prevents the browser from setting it automatically.
  
      scope.domElement.focus ? scope.domElement.focus() : window.focus();
  
      var mouseAction;
  
      switch (event.button) {
  
        case 0:
  
          mouseAction = scope.mouseButtons.LEFT;
          break;
  
        case 1:
  
          mouseAction = scope.mouseButtons.MIDDLE;
          break;
  
        case 2:
  
          mouseAction = scope.mouseButtons.RIGHT;
          break;
  
        default:
  
          mouseAction = - 1;
  
      }
  
      switch (mouseAction) {
  
        case MOUSE.DOLLY:
  
          if (scope.enableZoom === false) return;
  
          handleMouseDownDolly(event);
  
          state = STATE.DOLLY;
  
          break;
  
        case MOUSE.ROTATE:
  
          if (event.ctrlKey || event.metaKey || event.shiftKey) {
  
            if (scope.enablePan === false) return;
  
            handleMouseDownPan(event);
  
            state = STATE.PAN;
  
          } else {
  
            if (scope.enableRotate === false) return;
  
            handleMouseDownRotate(event);
  
            state = STATE.ROTATE;
  
          }
  
          break;
  
        case MOUSE.PAN:
  
          if (event.ctrlKey || event.metaKey || event.shiftKey) {
  
            if (scope.enableRotate === false) return;
  
            handleMouseDownRotate(event);
  
            state = STATE.ROTATE;
  
          } else {
  
            if (scope.enablePan === false) return;
  
            handleMouseDownPan(event);
  
            state = STATE.PAN;
  
          }
  
          break;
  
        default:
  
          state = STATE.NONE;
  
      }
  
      if (state !== STATE.NONE) {
  
        document.addEventListener('mousemove', onMouseMove, false);
        document.addEventListener('mouseup', onMouseUp, false);
  
        scope.dispatchEvent(startEvent);
  
      }
  
    }
  
    function onMouseMove(event) {
  
      if (scope.enabled === false) return;
  
      // event.preventDefault();
  
      switch (state) {
  
        case STATE.ROTATE:
  
          if (scope.enableRotate === false) return;
  
          handleMouseMoveRotate(event);
  
          break;
  
        case STATE.DOLLY:
  
          if (scope.enableZoom === false) return;
  
          handleMouseMoveDolly(event);
  
          break;
  
        case STATE.PAN:
  
          if (scope.enablePan === false) return;
  
          handleMouseMovePan(event);
  
          break;
  
      }
  
    }
  
    function onMouseUp(event) {
  
      if (scope.enabled === false) return;
  
      handleMouseUp(event);
  
      document.removeEventListener('mousemove', onMouseMove, false);
      document.removeEventListener('mouseup', onMouseUp, false);
  
      scope.dispatchEvent(endEvent);
  
      state = STATE.NONE;
  
    }
  
    function onMouseWheel(event) {
  
      if (scope.enabled === false || scope.enableZoom === false || (state !== STATE.NONE && state !== STATE.ROTATE)) return;
  
      // event.preventDefault();
      // event.stopPropagation();
  
      scope.dispatchEvent(startEvent);
  
      handleMouseWheel(event);
  
      scope.dispatchEvent(endEvent);
  
    }
  
    function onKeyDown(event) {
  
      if (scope.enabled === false || scope.enableKeys === false || scope.enablePan === false) return;
  
      handleKeyDown(event);
  
    }
  
    function onTouchStart(event) {
      if (scope.enabled === false) return;
      // event.preventDefault(); // prevent scrolling
  
      switch (event.touches.length) {
  
        case 1:
  
          switch (scope.touches.ONE) {
  
            case TOUCH.ROTATE:
  
              if (scope.enableRotate === false) return;
  
              handleTouchStartRotate(event);
  
              state = STATE.TOUCH_ROTATE;
  
              break;
  
            case TOUCH.PAN:
  
              if (scope.enablePan === false) return;
  
              handleTouchStartPan(event);
  
              state = STATE.TOUCH_PAN;
  
              break;
  
            default:
  
              state = STATE.NONE;
  
          }
  
          break;
  
        case 2:
          
          switch (scope.touches.TWO) {
            
            case TOUCH.DOLLY_PAN:
  
              if (scope.enableZoom === false && scope.enablePan === false) return;
              
              handleTouchStartDollyPan(event);
  
              state = STATE.TOUCH_DOLLY_PAN;
  
              break;
  
            case TOUCH.DOLLY_ROTATE:
  
              if (scope.enableZoom === false && scope.enableRotate === false) return;
  
              handleTouchStartDollyRotate(event);
  
              state = STATE.TOUCH_DOLLY_ROTATE;
  
              break;
  
            default:
  
              state = STATE.NONE;
  
          }
  
          break;
  
        default:
  
          state = STATE.NONE;
  
      }
  
      if (state !== STATE.NONE) {
  
        scope.dispatchEvent(startEvent);
  
      }
  
    }
  
    function onTouchMove(event) {
  
      if (scope.enabled === false) return;
  
      // event.preventDefault(); // prevent scrolling
      // event.stopPropagation();
  
      switch (state) {
  
        case STATE.TOUCH_ROTATE:
  
          if (scope.enableRotate === false) return;
  
          handleTouchMoveRotate(event);
  
          scope.update();
  
          break;
  
        case STATE.TOUCH_PAN:
  
          if (scope.enablePan === false) return;
  
          handleTouchMovePan(event);
  
          scope.update();
  
          break;
  
        case STATE.TOUCH_DOLLY_PAN:
  
          if (scope.enableZoom === false && scope.enablePan === false) return;
  
          handleTouchMoveDollyPan(event);
  
          scope.update();
  
          break;
  
        case STATE.TOUCH_DOLLY_ROTATE:
  
          if (scope.enableZoom === false && scope.enableRotate === false) return;
  
          handleTouchMoveDollyRotate(event);
  
          scope.update();
  
          break;
  
        default:
  
          state = STATE.NONE;
  
      }
  
    }
  
    function onTouchEnd(event) {
  
      if (scope.enabled === false) return;
  
      handleTouchEnd(event);
  
      scope.dispatchEvent(endEvent);
  
      state = STATE.NONE;
  
    }
  
    function onContextMenu(event) {
  
      if (scope.enabled === false) return;
  
      event.preventDefault();
  
    }
  
    //
  
    // scope.domElement.addEventListener('contextmenu', onContextMenu, false);
  
    // scope.domElement.addEventListener('mousedown', onMouseDown, false);
    // scope.domElement.addEventListener('wheel', onMouseWheel, false);
    // scope.domElement.addEventListener('touchstart', onTouchStart, false);
    // scope.domElement.addEventListener('touchend', onTouchEnd, false);
    // scope.domElement.addEventListener('touchmove', onTouchMove, false);
  
    // scope.domElement.addEventListener('keydown', onKeyDown, false);
    
    scope.onMouseDown=onMouseDown;
    scope.onContextMenu=onContextMenu;
    scope.onMouseWheel=onMouseWheel;

    scope.onTouchStart=onTouchStart;
    scope.onTouchEnd=onTouchEnd;
    scope.onTouchMove=onTouchMove;

    scope.onKeyDown=onKeyDown;

    // make sure element can receive keys.
  
    if (scope.domElement.tabIndex === - 1) {
  
      scope.domElement.tabIndex = 0;
  
    }
  
    // force an update at start
  
    this.update();
  
  };
  
  OrbitControls.prototype = Object.create(EventDispatcher.prototype);
  OrbitControls.prototype.constructor = OrbitControls;
  return OrbitControls;
}